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Use of a new torsion pendulum for polypropylene property evaluation
Author(s) -
Weir F. E.
Publication year - 1962
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760020408
Subject(s) - torsion pendulum clock , materials science , torsion (gastropod) , polypropylene , composite material , crystallinity , shear modulus , pendulum , moduli , property (philosophy) , mechanical engineering , physics , engineering , medicine , philosophy , surgery , epistemology , quantum mechanics
A new recording system for a torsion pendulum is described. By its use data on the internal loss and shear modulus of a polymeric material can be obtained quickly and easily in digital form, rather, than the more usual graphical form. The system is simple and easy to operate, is rugged and is inexpensive relative to other systems. The precision available is excellent. An application of the instrument in the determination of the crystallinity of polypropylene is described.